MicroQRBarcodeData Class

Summary

Contains the data for a single MicroQR barcode.

Syntax

Objective-C

C++/CLI

Java

Python

[SerializableAttribute()] 
public class MicroQRBarcodeData : BarcodeData

@interface LTMicroQRBarcodeData : LTBarcodeData<NSCopying>

public class MicroQRBarcodeData extends BarcodeData

[TypeConverterAttribute()] 
[SerializableAttribute()] 
public ref class MicroQRBarcodeData : public BarcodeData, System.ICloneable

class MicroQRBarcodeData(BarcodeData):

Remarks

The MicroQRBarcodeData class derives from the base BarcodeData to add specific data that can be read or written when using MicroQR barcodes.

Reading Barcodes

When the BarcodeReader object detects and reads a MicroQR ( BarcodeSymbology.MicroQR), the BarcodeReader.ReadBarcode and BarcodeReader.ReadBarcodes methods will return the MicroQRBarcodeData object for each barcode cast down to the base BarcodeData class.

You can perform standard .NET casting to get the object as MicroQRBarcodeData and then examine the extra data properties associated with it.

MicroQR read options not related to the barcode data can be set using the MicroQRBarcodeReadOptions class.

Writing Barcodes

The BarcodeWriter class contains the WriteBarcode method that is used to write a barcode to an image. This method accepts the data parameter as the base BarcodeData object. To write a MicroQR barcode, create an instance of MicroQRBarcodeData and fill the required parameters, then pass this object as the data parameter to WriteBarcode.

MicroQR write options not related to the barcode data can be set using the MicroQRBarcodeWriteOptions class.

You can use the static (or Shared in VB) BarcodeData.CreateDefaultBarcodeData method to create a new instance of MicroQRBarcodeData that contains default parameters ready for writing to an image:

vb[VB Snippet] 
Dim MicroQRData As MicroQRBarcodeData = DirectCast(BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR), MicroQRBarcodeData)

C# Snippet

MicroQRBarcodeData MicroQRData = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR) as MicroQRBarcodeData;

Example

This example writes a couple of MicroQR barcodes with different options to an image and then reads them back.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
 
public void MicroQRBarcode_Example() 
{ 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyMicroQRBarcodes.tif"); 
 
   BarcodeEngine engine = new BarcodeEngine(); 
 
   // Create the image to write the barcodes to 
   int resolution = 300; 
   using (RasterImage image = RasterImage.Create((int)(8.5 * resolution), (int)(11.0 * resolution), 1, resolution, RasterColor.FromKnownColor(RasterKnownColor.White))) 
   { 
      // Write two MicroQR barcodes 
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.AutoSize, "MicroQR Data 1", 0); 
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.MicroQRM4M, "Data", 1000); 
 
      // Save the image 
      using (RasterCodecs codecs = new RasterCodecs()) 
      { 
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1); 
      } 
   } 
 
   // Now read the barcodes again 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      using (RasterImage image = codecs.Load(imageFileName)) 
      { 
         // Read all the MicroQR barcodes 
         ReadBarcodes(engine.Reader, image); 
      } 
   } 
} 
 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, MicroQRBarcodeSymbolModel symbolModel, string value, int startRow) 
{ 
   // Create the barcode data 
   MicroQRBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR) as MicroQRBarcodeData; 
   barcode.Value = value; 
   barcode.Symbology = BarcodeSymbology.MicroQR; 
 
   // We will use the alignment to position the barcodes, so use all of the image 
   barcode.Bounds = new LeadRect(0, startRow, image.ImageWidth, image.ImageHeight); 
 
   // Set the write options 
   MicroQRBarcodeWriteOptions options = new MicroQRBarcodeWriteOptions(); 
 
   options.XModule = 30; 
   options.SymbolModel = symbolModel; 
 
   // Write it 
   Console.WriteLine("Writing barcode with symbol model: {0} and Data: {1}", symbolModel, value); 
   writer.WriteBarcode(image, barcode, options); 
} 
 
private void ReadBarcodes(BarcodeReader reader, RasterImage image) 
{ 
   // Setup read options 
   MicroQRBarcodeReadOptions options = new MicroQRBarcodeReadOptions(); 
 
   Console.WriteLine("Reading MicroQR barcodes"); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.MicroQR }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (MicroQRBarcodeData barcode in barcodes) 
   { 
      Console.WriteLine(" At {0}, and data: {1} and symbology: {2}", barcode.Bounds, barcode.Value, barcode.Symbology); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

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Help Version 22.0.2023.5.9

Leadtools.Barcode Assembly

Introduction

Getting Started

Namespaces

Leadtools.Barcode Namespace

Assemblies

MicroQRBarcodeData Class

Reading Barcodes

Writing Barcodes

Reference